Submission #242462

#	Time	Username	Problem	Language	Result	Execution time	Memory
242462		MatesV13	Ljetopica (COI19_ljetopica)	C++11	0 / 100	5 ms	384 KiB

ljetopica

#include <bits/stdc++.h>
using namespace std;
long long n, k, ans, mod=1000000007;
string upute, l, r, rj1, rj2;
bool comp (string manji, string veci){
	if (manji.size()!=veci.size()) 
		return manji.size() < veci.size();
	return manji <= veci;
}
int main (){
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> n >> k;
cin >> upute;
cin >> l;
cin >> r;
rj1="1", rj2="1";
for (int i=0; i<n-1; i++){
	if (upute[i]=='L') {rj1+='0'; rj2+='1';}
	else {rj1+='1'; rj2+='0';}
} 
if (comp(l, rj1) and comp(rj1, r)){
	long long sol=0;
	for (int i=0; i<n; i++){
		sol*=2;
		sol+=rj1[i]-'0';
		sol%=mod;
	} ans+=sol;
}
if (comp(l, rj2) and comp(rj2, r)){
	long long sol=0;
	for (int i=0; i<n; i++){
		sol*=2;
		sol+=rj2[i]-'0';
		sol%=mod;
	} ans+=sol;
}
cout << ans;
return 0;
}

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 17
• Subtask 4: 0 / 61